Cristiano Ronaldo marked his 600th league appearance with his 20th Serie A goal of the season as Juventus comfortably beat Spezia.
All three goals came in the second half, with Ronaldo getting his side's third when he finished off a quick counter-attack in the final minute.
Alvaro Morata had turned in Federico Bernardeschi's cross for the opener before Federico Chiesa tapped in.
Victory moved Juventus to within three points of second-placed AC Milan.
Ronaldo's goal means he has become the first player to score at least 20 goals in each of the past 12 seasons in Europe's top five leagues.